Cleaning compositions containing boric acid or an alkali metal borate in phosphoric acid and their use in cleaning solid surfaces

摘要

This invention is directed to a process for cleaning solid surfaces with aqueous alkaline cleaning compositions comprising (a) strongly alkaline active-substance concentrates and (b) acidic active- substance concentrates comprising dispersions of boric acid or alkali metal borates in orthophosphoric acid. Component (a) is present in an excess over component (b) sufficient to cause an alkaline medium.